55 digital input/output pins, 35 PWM output pins.USB device 480 Mbit/sec & USB host 480 Mbit/sec.QSPI memory expansion, locations for 2 extra RAM or Flash chips.7936K Flash, 1024K RAM (512K tightly coupled), 4K EEPROM (emulated).So far we are still waiting on NXP to deliver more chips forĭifferences between Teensy 4.1 & Teensy 4.0 Last through April and the first half of May (standard disclaimer: this update isn't a If sales continue at normal pace, these are expected to Update, March 14, 2023: Good news, we have plenty of Teensy 4.1 in stockĪnd in our production queue. Lockable Teensy USB Board, Version 4.1, Without Ethernet Chip See Code Security for Lockable Teensy details. Lockable Teensy USB Board, Version 4.1, With Ethernet Chipįor commercial products and secure applications, Teensy USB Board, Version 4.1, Without Ethernet Chip Teensy USB Board, Version 4.1, With Ethernet Chipįor prototypes, experimentation, and learning